Pete, I got scared off with using repellents.
Apparently, a lot of people don't like using coils because it's not good to get that stuff on the mirror ? I don't know how true this is or how many people still do it. Perhaps someone who knows would like to comment. I read a thread a few years back.
And as for the RID or Aeroguard it's an instant killer to eyepiece glass if that stuff gets on them. So I'm extremely careful on where I put it on and only do rarely and with caution. So I ended resorting to the fan, which really did work the best.
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